The article discusses the synthesis and properties of a series of innovative donor-acceptor viologens with through-space conjugation for enhanced visible-light-driven photocatalysis. These compounds exhibit a synergistic effect of D-A conjugation and TSC, resulting in a narrower energy gap, excellent redox properties, strong absorption in the visible range up to 450 nm, and high efficiency of intramolecular charge transfer. The viologens also demonstrate long-lived charge separation states and stable radical formation. Compound 9, in particular, shows a 94% yield in oxidative coupling reactions under visible light due to its strong intramolecular charge transfer effect. Moreover, when integrated into graphitic carbon nitride, compound 9 enhances hydrogen production performance under visible light, achieving an impressive H2 generation rate of 4102 µmol h-1g-1. The study highlights the potential applications of these through-space conjugation viologens in photocatalytic systems, emphasizing their efficiency and versatility in visible-light-driven processes. The article also includes detailed figures depicting the design strategy, synthetic route, X-ray single-crystal structures, UV/vis and fluorescence spectra, transient absorption spectra, and photocatalytic oxidative coupling mechanisms of the viologens.